Our Analysts Found the 270637_LB Stealer Log Shared in a Telegram Channel

HEROIC analysts flagged the 270637_LB_178.135.15.126_07-06-23 stealer log after it surfaced in a Telegram channel in June 2023. The file contains 49 records harvested from compromised machines, including email addresses, plaintext passwords, and URLs. The log represents real stolen credentials that were packaged by a threat actor and distributed through Telegram's underground network.

Why the 270637_LB Stealer Log Is Dangerous

Forty-nine exposed records may sound limited, but each record includes a working email address paired with a plaintext password. Attackers do not need any extra tools to use these credentials. They can load the file and start testing logins against email providers, streaming services, banks, and workplace systems right away. The URLs logged alongside each credential show exactly which services were being used, giving attackers a shortlist of where to focus first.

What Was Exposed in the 270637_LB Stealer Log

• Email Addresses
• Plaintext Passwords
• URLs

Why This Matters

Plaintext passwords are the highest-value credential an attacker can obtain. There is no cracking step, no waiting, and no uncertainty. When a real email and its matching plaintext password are both in a file circulating on Telegram, credential stuffing and account takeover become trivial. For victims who reused that password, the exposure extends to every account using the same credentials, creating risks of identity theft, financial fraud, and unauthorized access to personal data.

How Stealer Logs Like the 270637_LB File Work

A stealer log is the output of info-stealing malware. The malware infects a machine through a phishing link, a fake software installer, or a malicious browser extension. Once running, it silently copies saved passwords from the browser, captures credentials entered by the user, and records which URLs are visited. That harvested data is compressed into a structured log file and uploaded to a server or shared directly in private Telegram channels. Groups of these logs from the same campaign, like the June 2023 batch that included the 270637_LB file, are traded in bulk among cybercriminals.

Check If You Are Affected

HEROIC's free breach scanner covers more than 400 billion exposed records from stealer logs, database dumps, and combolists. Search your email address now to find out if it appeared in the 270637_LB log or any related Telegram leak. If you show up, change that password immediately and set up two-factor authentication on all affected accounts.